CN1885701A - DC/DC transformation topology circuit of high-voltage switch power supply - Google Patents
DC/DC transformation topology circuit of high-voltage switch power supply Download PDFInfo
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- CN1885701A CN1885701A CNA2006100609848A CN200610060984A CN1885701A CN 1885701 A CN1885701 A CN 1885701A CN A2006100609848 A CNA2006100609848 A CN A2006100609848A CN 200610060984 A CN200610060984 A CN 200610060984A CN 1885701 A CN1885701 A CN 1885701A
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Abstract
The DC/DC topological circuit for high-voltage switch power comprises two semi-bridge converters every with primary side in series with four tubes (Q1-Q4) and capacitors (C1-C4) connected with input voltage Ui and the paralleled secondary side, wherein C1-C2/C3-C4 and Q1-Q2/Q3-Q4 form a semi-bridge structure connected with secondary side through transformer T1/T2; Q1/Q2 and Q3/Q4 are controlled by same signal. This invention can be applied for higher voltage condition just by added semi-bridge converter.
Description
Technical field
The present invention relates to high frequency switch power, mainly be meant a kind of DC/DC transformation topology circuit that is applied to the high-voltage switch power supply of some high direct voltage occasions.
Background technology
With regard to basic pulse duration adjustment (PWM) converter major loop topological structure, multiple converters such as Buck, Boost, Buck-Boost, Cuk are arranged at present.The circuit structure of the switching mode voltage stabilizer that develops out on this basis (DC/DC converter) is varied, wherein the switching tube pressure-bearing of double tube positive exciting formula and half-bridge circuit only is an input supply voltage, and the saturated problem of unidirectional magnetic bias can not occur, so in the high pressure input circuit, be widely used.
(see figure 1) in half-bridge circuit, Q1, Q2 (can be triode or metal-oxide-semiconductor, this paper is example with the triode, down together) are logical at the different driving pulse control lower whorl conductance of phase place.Before the Q1 conducting, C1, C2 are by input voltage Ui charging, and A point current potential is with respect to reference to ground being+1/2Ui among the figure.When the Q1 conducting, input voltage Ui is added to transformer by the C-E utmost point of Q1, and pulse current flows through transformer and capacitor C2, and at this moment, the C-E voltage across poles of elementary both end voltage of pulse transformer and Q1 is 1/2Ui, and the voltage that Q2 bears is input voltage Ui; At secondary, according to winding end corresponding relation of the same name, winding 4-3 voltage makes the D2 conducting, exports after L1, C3 filtering.When Q1 ends, after the Q2 conducting, input voltage Ui is added to transformer by C1, Q2, pulse current flows through capacitor C1, transformer and Q2, at this moment, the C-E voltage across poles of elementary both end voltage of pulse transformer and Q2 is 1/2Ui, and the voltage that Q1 bears is input voltage Ui; At secondary, according to winding end corresponding relation of the same name, winding 4-5 voltage makes the D1 conducting, exports after L1, C3 filtering, finishes a work period.
The major advantage of half-bridge circuit: have stronger anti-unbalance ability, circuit symmetry is good; The power bracket that adapts to is bigger; Switching tube is withstand voltage to be DC input voitage etc.
Though half-bridge circuit is DC input voitage to the requirement of withstand voltage of switching tube, and is lower, in the occasion of some high pressure, its application still is restricted.In side circuit, because the influence of lead-in inductance in the leakage inductance of high frequency transformer and the collector loop, can cause bigger negative peak spine at the switching tube shutdown moment, add measure such as buffer loop in the circuit after, generally the negative peak spine should be limited in steady-state value 20% in.In addition, also should be taken into account the influence of power network fluctuation+10% o'clock, so the voltage that switching tube bears is 1.2 * 1.1Ui=1.32Ui, when being input as the 800V direct current, even do not consider derate, the withstand voltage of switching tube also will reach Uceo=1.32 * 800=1056V, and such high speed switch tube is difficult to choose.If import highlyer than 800V, reach 1000V, 1200V, then parts selection is just more difficult, even it is optional not have appropriate device.During the high pressure input, the also corresponding raising of the requirement of withstand voltage of other devices is difficult to find satisfactory device in the circuit.Even find suitable device, work under the high voltage situation, the reliability of whole power supply is reduced greatly.In addition, half-bridge circuit uses a transformer, and electric current is excessive, can make it saturated, and it is very big that power output can not be done.
Summary of the invention
The purpose of this invention is to provide a kind of DC/DC transformation topology circuit that is applicable to the Switching Power Supply of high pressure occasion (can reach more than the 1000V), by the half-bridge converter of the former limit series connection of two-way or multichannel, secondary parallel connection is set, can overcome the defective that existing half-bridge circuit exists.
Realize that technical scheme of the present invention is: this topological circuit comprises half-bridge converter, and the structure after it improves is: the two-way half-bridge converter is set, its former limit series connection, secondary (see figure 2) in parallel.
This technical scheme also comprises:
After connecting respectively, four switching tube Q1-Q4 on described former limit, four capacitor C-1C4 are attempted by input voltage Ui two ends; Wherein capacitor C 1, C2 and switching tube Q1, Q2 be connected into the half-bridge converter structure and through transformer T1 to secondary, capacitor C 3, C4 and switching tube Q3, Q4 be connected into the half-bridge converter structure and by transformer T2 to secondary; In the switching tube, Q1, Q3 are subjected to same signal controlling, and Q2, Q4 are subjected to same signal controlling.
Described at secondary, transformer T1 secondary coil is exported by D1, D2 full-wave rectification, connects inductance L 1 smothing filtering again; Transformer T2 too, secondary coil is exported by D3, D4 full-wave rectification, connects inductance L 2 smothing filterings again, then with the two-way output-parallel, exports through C7 filtering again.
The above half-bridge converter of two-way or two-way is set, its former limit series connection, secondary parallel connection.
One topological circuit, wherein four capacitor C 1, C2, C3, C6 connect, and are connected on direct current input two ends, each electric capacity two ends resistance in parallel; Four switching tubes also are together in series, and the collector electrode of Q1 connects the input direct-flow positive pole, and emitter connects the collector electrode of Q3, and the Q3 emitter connects the collector electrode of Q6, and the emitter of Q6 connects the collector electrode of Q7, and the emitter of Q7 connects input direct current negative pole; Again the mid point of C2, C3 and the mid point of Q3, Q6 are coupled together; Simultaneously, the Q1 emitter is linked 3 pin of TR2, through feeding back the former limit winding that winding 3-5 is connected to TR1, is connected to 2 pin, and the winding other end is connected to the mid point of C1, C2 through an isolation capacitance C4; Be connected equally with top, the Q6 emitter is linked 3 pin of TR4, is connected to the former limit winding of TR3 through feedback winding 3-5, be connected to 2 pin, the winding other end is connected to the mid point of C3, C6 through an isolation capacitance C5, and like this, the former limit major loop part of two-way half-bridge converter connects.At the secondary of transformer TR1,5,6,7 pin are connected, 5,6,7 pin with TR3 connect together then, as the negative terminal of power supply output; 10,11 pin connect after the D6 rectification is connected after the D7 rectification with 8,9 pin, then through L1, C20, C21, the output of C22 filtering direct current; The secondary connection of TR3 is identical with TR1's, then two-way output is connected, and output in parallel is exported as power supply.Winding 12-13, the 12-14 of TR1 be through D1, D2 rectification, links together after D12, D13 rectification with winding 12-13, the 12-14 of TR3, again through being connected to 12 pin of TL494 after the C10 filtering, as the prime working power; The base stage that the 11 pin output of TL494 connects Q4 controls it and opens shutoff, and after transformer TR2 transmission, by the shutoff of opening of R11, R24 control Q1, Q3, R10, D4, C12, R23, D9, C24 are accelerating circuit; The base stage that the 8 pin output of TL494 connects Q5 controls it and opens shutoff, and after transformer TR4 transmission, by the shutoff of opening of R44, R53 control Q6, Q7, R43, D16, C37, R52, D20, C46 are accelerating circuit.Open shutoff by TL494 control switch pipe Q1, Q3, Q6, Q7 by design frequency, thereby make the power supply operate as normal.
The beneficial effect that the present invention has: 1. adopt the series connection dividing potential drop, according to the half-bridge converter characteristic, the voltage that each switching tube bears is half of input direct voltage Ui, is convenient to the selection of switching tube like this.2. the secondary parallel connection of two transformers, output current can force rate single half-bridge converter be twice, corresponding output power also increases and is twice.3. this topological circuit can be in more high voltage occasion use, and by increase by one road half-bridge converter again on above circuit base, connect in same former limit, and the secondary parallel connection can make the voltage that bears of each switching tube reduce.And the like, this topological structure can be applicable to any high voltage occasion in theory.
Description of drawings:
Fig. 1 is the main circuit structure of existing half-bridge converter.
Fig. 2 is a main circuit topological structure of the present invention;
Fig. 3 is the practical application reference circuit figure of invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
With reference to Fig. 2, use the two-way half-bridge converter, with their former limit series connection, secondary parallel connection.Four switching tube Q1-Q4 series connection, four capacitor C 1-C4 series connection are connected to the input voltage two ends.Above two electric capacity (C1, C2), switching tube (Q1, Q2) be connected into the half-bridge converter structure, T1 transfers energy to secondary by transformer.Below two electric capacity (C3, C4), switching tube (Q3, Q4) be connected into the half-bridge converter structure, T2 transfers energy to secondary by transformer.In four switching tubes, Q1, Q3 are subjected to same signal controlling, open synchronously, turn-off, and when it was opened, pulse current flowed to and is Q1, T1, C7, C2, Q3, T2, C8, C4, and the voltage that is added to transformer T1, T2 is 1/4Ui.Q2, Q4 are subjected to same signal controlling, open synchronously, turn-off, and when it was opened, pulse current flowed to and is C1, C7, T1, Q2, C3, C8, T2, Q4, and the voltage that is added to transformer T1, T2 also is 1/4Ui.The direction of the transformer current of flowing through for twice is opposite, forms the square-wave voltage of symmetry.Capacitor C 5, C6 establish for cutting off direct current.At secondary, the output of two-way transformer is in parallel behind full-wave rectification, capacitor filtering, supply load, the same half-bridge converter of operation principle.
Another characteristics of this circuit, four series capacitances of input can automatically equalizing voltages, and promptly the voltage at each electric capacity two ends is 1/4Ui.
Because the series connection dividing potential drop, the voltage at each electric capacity two ends is 1/4 input voltage Ui.According to the half-bridge converter characteristic, the voltage that each switching tube bears is half of input direct voltage Ui.When input direct voltage is 800V, according to 1.32Ui=Uceo, try to achieve Uceo=1.32 * 400=528V, such switching tube is fine choosing.
The secondary parallel connection of two transformers, output current can force rate single half-bridge converter be twice, corresponding output power also increases and is twice.
The topologies of this circuit in high voltage occasion more, also can be used.When DC input voitage is higher, can on above circuit base, increase by one road half-bridge converter again, same former limit series connection, the secondary parallel connection can make the voltage drop of bearing of each switching tube get off.And the like, this topological structure can be applied to any high voltage occasion in theory as required.
With reference to Fig. 3, input direct voltage is through C1, C2, C3, the C6 dividing potential drop of connecting, to switching tube Q1, Q3, Q6, Q7 power supply.R1, R2, R3, R4 are grading resistor.C1, C2, Q1, Q3, TR1 form one tunnel half bridge converter that the self-exciting starting circuit arranged, and its PWM modulation signal is provided through isolating transformer TR2 by prime TL494.C3, C6, Q6, Q7, TR3 form one tunnel half bridge converter that the self-exciting starting circuit arranged, and its PWM modulation signal is provided through isolating transformer TR4 by prime TL494.The former limit series connection of two-way half-bridge, i.e. C1, C2, C3, C6 series connection, Q1, Q3, Q6, Q7 series connection, output in parallel after secondary rectification, the filtering.Q1, Q6 synchro switch, when it was opened, pulse current flow through Q1, TR1, C2, Q6, TR3, C6 had 1/4 input voltage to be added in the former limit of transformer TR1, TR3; Q3, Q7 synchro switch, when it was opened, pulse current flow through C1, TR1, Q3, C3, TR3, Q7 had 1/4 input voltage to be added in the former limit of transformer TR1, TR3, and twice current direction is opposite, forms symmetrical square wave voltage.To secondary, the output of TR1, TR3 output in parallel after over commutation, filtering separately.Repeat top process later on.The startup operation principle of two-way converter is identical, the existing course of work of only analyzing Q1, Q3 one tunnel.Energized moment,, produce a collector current pulse because the unbalanced factor of circuit has a first conducting in two switching tubes.Starting impulse is through the feedback winding 3-5 of pulse transformer TR2, and the switching tube generation positive feedback to first conducting makes it saturated, and produced simultaneously inductive impulse makes another switching tube remain off.Earlier saturated switching tube electric current, through TR1 winding 1-2, dividing potential drop electric capacity, by TR3 secondary winding 12-13-14 output inductive impulse, through D1, D2 rectification, C10 filtering provides starting resistor to prime promotion level and TL494.Front stage circuits output driving pulse makes Q4 and Q5 alternate conduction finish the DC/AC conversion.So far, the self-exciting starting process is finished, and circuit working is in separate excitation half-bridge operating state.R10, D4, the C12 of the series connection of switching tube base loop are accelerating circuit, end loss with the conducting that reduces switching tube.
Claims (5)
1. the DC/DC transformation topology circuit of a high-voltage switch power supply comprises half-bridge converter, it is characterized in that being provided with the two-way half-bridge converter, its former limit series connection, secondary parallel connection.
2. the DC/DC transformation topology circuit of high-voltage switch power supply as claimed in claim 1 is characterized in that being attempted by input voltage Ui two ends after four switching tube Q1-Q4 on described former limit, four capacitor C 1-C4 connect respectively; Wherein capacitor C 1, C2 and switching tube Q1, Q2 be connected into the half-bridge converter structure and through transformer T1 to secondary, capacitor C 3, C4 and switching tube Q3, Q4 be connected into the half-bridge converter structure and by transformer T2 to secondary; In the switching tube, Q1, Q3 are subjected to same signal controlling, and Q2, Q4 are subjected to same signal controlling.
3. the DC/DC transformation topology circuit of high-voltage switch power supply as claimed in claim 1, it is characterized in that transformer T1 in the described secondary, T2 secondary winding output parallel connection behind full-wave rectification, capacitor filtering, wherein secondary winding 4 connects cross-over connection capacitor C 7 between back and the T1 secondary winding 5.
4. the DC/DC transformation topology circuit of high-voltage switch power supply as claimed in claim 1 is characterized in that being provided with the above half-bridge converter of two-way or two-way, its former limit series connection, secondary parallel connection.
5. the DC/DC transformation topology circuit of high-voltage switch power supply as claimed in claim 1, it is characterized in that a topological circuit, the capacitor C 1 of cross-over connection series connection behind the resistance R 1-R4 of its direct-flow input end cross-over connection series connection, C2, C3, C6, this direct current input positive pole connects triode Q1 collector electrode, the Q1 emitter connects triode Q3 collector electrode, the Q3 emitter connects triode Q6 collector electrode, the Q6 emitter connects triode Q7 collector electrode, the Q7 emitter connects input direct current negative pole, the Q1 emitter connects transformer TR2 pin 3, and through feeding back the former limit winding pin 2 that winding 3-5 meets transformer TR1, the TR1 other end is connected across C1 through capacitor C 4, between the C2; The Q6 emitter connects transformer TR4 pin 3, and through feeding back the former limit winding pin 2 that winding 35 meets transformer TR3, the TR4 other end is connected across between C3, the C6 through capacitor C 5; TR1 secondary pin 5,6,7 connects the back and is connected with TR3 pin 5,6,7, and pin 10,11 connects after diode D6 is connected with pin 8,9 diode D7 connection, again coils L1, C20, C21, C22 output; The same TR1 of TR3 exports after the two-way parallel connection; TR1 winding 12-13,12-14 link together behind D12, D13 through D1, D2 and TR3 winding 12-13,12-14, connect TL494 pin 12 again behind C10; TL494 pin 11 connects the Q4 base stage, meets Q1, Q3 through TR2, R11, R24; TL494 pin 8 connects the Q5 base stage, meets Q6, Q7 through TR4, R44, R53; R10, D4, C12, R23, D9, C24 and R43, D16, C37, R52, D20, C46 are respectively accelerating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100609848A CN100401628C (en) | 2006-06-07 | 2006-06-07 | DC/DC transformation topology circuit of high-voltage switch power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100609848A CN100401628C (en) | 2006-06-07 | 2006-06-07 | DC/DC transformation topology circuit of high-voltage switch power supply |
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| CN1885701A true CN1885701A (en) | 2006-12-27 |
| CN100401628C CN100401628C (en) | 2008-07-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972881A (en) * | 2010-11-11 | 2011-02-16 | 深圳市华意隆实业发展有限公司 | Asymmetrical half-bridge zero-voltage soft switching inverter type welding and cutting machine |
| CN102013809A (en) * | 2010-12-30 | 2011-04-13 | 南京航空航天大学 | Double-line double-tube normal shock direct current converter with transformer with two secondary sides |
| CN102013810A (en) * | 2010-12-30 | 2011-04-13 | 南京航空航天大学 | Double-circuit double-tube forward shock combined converter with output midpoint |
| CN103280975A (en) * | 2013-05-16 | 2013-09-04 | 北京波尔通信电源设备有限公司 | Extendable high direct voltage input power supply and extension method |
| CN104995809A (en) * | 2012-10-23 | 2015-10-21 | 施密徳豪泽股份公司 | DC converter |
| CN107834860A (en) * | 2017-11-13 | 2018-03-23 | 国网江苏省电力公司南通供电公司 | Tandem type DAB topological structures |
| CN113691141A (en) * | 2021-10-11 | 2021-11-23 | 重庆平创半导体研究院有限责任公司 | Topological structure of DC-DC converter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2717329B2 (en) * | 1991-08-29 | 1998-02-18 | 株式会社日立製作所 | DC / DC converter |
| CN2159082Y (en) * | 1993-03-05 | 1994-03-16 | 哈尔滨市三尖变流技术研究所 | Switch-type DC power transformer |
| CN2309015Y (en) * | 1997-10-16 | 1999-02-24 | 赵敏 | Vehicle mains of novel d. c. mine electric locomotive |
| CN2458816Y (en) * | 2001-01-08 | 2001-11-07 | 程大鹏 | Full-voltage series independent-excited pure DC/DC converter |
| DE10204882A1 (en) * | 2002-02-06 | 2003-08-14 | Compact Dynamics Gmbh | Half-bridge circuit has fast switching diodes connected in parallel with each arm |
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2006
- 2006-06-07 CN CNB2006100609848A patent/CN100401628C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972881A (en) * | 2010-11-11 | 2011-02-16 | 深圳市华意隆实业发展有限公司 | Asymmetrical half-bridge zero-voltage soft switching inverter type welding and cutting machine |
| CN101972881B (en) * | 2010-11-11 | 2012-07-11 | 深圳华意隆电气股份有限公司 | Asymmetrical half-bridge zero-voltage soft switching inverter type welding and cutting machine |
| CN102013809A (en) * | 2010-12-30 | 2011-04-13 | 南京航空航天大学 | Double-line double-tube normal shock direct current converter with transformer with two secondary sides |
| CN102013810A (en) * | 2010-12-30 | 2011-04-13 | 南京航空航天大学 | Double-circuit double-tube forward shock combined converter with output midpoint |
| CN104995809A (en) * | 2012-10-23 | 2015-10-21 | 施密徳豪泽股份公司 | DC converter |
| US10256736B2 (en) | 2012-10-23 | 2019-04-09 | Schmidhauser Ag | DC-DC converter with polarity reversal protection |
| CN103280975A (en) * | 2013-05-16 | 2013-09-04 | 北京波尔通信电源设备有限公司 | Extendable high direct voltage input power supply and extension method |
| CN107834860A (en) * | 2017-11-13 | 2018-03-23 | 国网江苏省电力公司南通供电公司 | Tandem type DAB topological structures |
| CN113691141A (en) * | 2021-10-11 | 2021-11-23 | 重庆平创半导体研究院有限责任公司 | Topological structure of DC-DC converter |
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| CN100401628C (en) | 2008-07-09 |
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